Oh, you should toss me your FC then Sus. Mine's 3840-6826-4224.
The Summon action you're talking about is basically you perform some action, be it a normal attack, a powerful Special, or a healing ability (really, it depends on what you want) and you "record" that action through the Send option from the Summon Friend command in the battle menu. What I'll do when I'm setting up an action will be to save up a few BP by Defaulting a bit, then expending all but the last action by buffing myself (If I'm going for an attack I'll maybe use Invigorate from Monk a few times to boost my P.Atk to 150%) and then on the last command I'll go to the Send option, which changes the border of the Battle menu to show that the next action will be the one sent. I'll then select the action and execute it, and when it comes to that turn, you'll see that character hold out the crystal pendant (which will start to glow) and then perform the action, and immediately following the action, they'll hold the pendant up and a light will shoot from it.
Once the battle is over and your Exp, money, and job points are tallied up, you'll be taken to another screen that shows your character, your Mii, and the action performed, and it'll say that your Street Pass has been updated. What you'll need to do then is go to the Update Data option on the Save Menu (Save Game, Add Friend, Update Data, etc), and let it update the data. Though your Street Pass was updated with the action, you'll need to actually do the Update Data to send it out to your friends.
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